1. To indicate the different forms a verb can have; for example, according to the number of people it refers to and whether it refers to the present, past, or future tenses or time.
2. To inflect (a verb) in its forms for distinctions; such as, number, person, voice, mood, and tense.
3. To unite chemically so that the product is easily broken down into the original compounds.
4. The science of matter or the branch of the natural sciences dealing with the composition of substances and their properties and reactions.